looking for info on Polish RAF pilot Wladyslaw Zigmund Nowak.

[VoyTech]

Wladyslaw Zygmunt (that's how you spell his middle name in Polish) Nowak, born 4.6.1919, service no. 781512
According to my files he was not a pilot in any Polish fighter squadron during the war. On 27 November 1944 he had a minor taxiing accident in Hurricane KZ399 of No. 679 Sqn at Ipswich. I cannot say if he was a pilot of the squadron, or a ferry pilot at the time. In each case he may have flown Spitfires but not operationally, and not at Northolt. His service number indicates he has arrived in UK in 1940, and he may have been a ground crew member (possibly on Spitfires, possibly at Northolt) before training as a pilot.
He ended his service in the WW2 Polish Air Force at the rank of a Warrant Officer.
Your friend might apply to the MOD for detailed information about his service, both pre-war in Poland (if any) and in Britain during and after WW2.